checkPermits(permits);
    synchronized (mutex()) {
      return reserveAndGetWaitLength(permits, stopwatch.readMicros());
    }
  }

  /**
   * Acquires a permit from this {@code RateLimiter} if it can be obtained without exceeding the
   * specified {@code timeout}, or returns {@code false} immediately (without waiting) if the permit
   * would not have been granted before the timeout expired.
   *

   * builder.build().trimmed()}.
   */
  public static Builder builder() {
    return new Builder(10);
  }

  /**
   * A builder for {@link ImmutableIntArray} instances; obtained using {@link
   * ImmutableIntArray#builder}.
   */
  public static final class Builder {
    private int[] array;
    private int count = 0; // <= array.length

    Builder(int initialCapacity) {

   * builder.build().trimmed()}.
   */
  public static Builder builder() {
    return new Builder(10);
  }

  /**
   * A builder for {@link ImmutableDoubleArray} instances; obtained using {@link
   * ImmutableDoubleArray#builder}.
   */
  public static final class Builder {
    private double[] array;
    private int count = 0; // <= array.length

    Builder(int initialCapacity) {

@GwtCompatible
@ElementTypesAreNonnullByDefault
abstract class AbstractMapBasedMultimap<K extends @Nullable Object, V extends @Nullable Object>
    extends AbstractMultimap<K, V> implements Serializable {
  /*
   * Here's an outline of the overall design.
   *
   * The map variable contains the collection of values associated with each
   * key. When a key-value pair is added to a multimap that didn't previously

   * other using {@code second = new PairedStatsAccumulator().addAll(first).snapshot()}, if both
   * were obtained by calling {@code snapshot()} on the same {@link PairedStatsAccumulator} without
   * adding any values in between the two calls, or if one is obtained from the other after
   * round-tripping through java serialization. However, floating point rounding errors mean that it

    return Collections.unmodifiableList(asStripes);
  }

  // Static factories

  /**
   * Creates a {@code Striped<L>} with eagerly initialized, strongly referenced locks. Every lock is
   * obtained from the passed supplier.
   *
   * @param stripes the minimum number of stripes (locks) required
   * @param supplier a {@code Supplier<L>} object to obtain locks from
   * @return a new {@code Striped<L>}
   */

   * other using {@code second = new StatsAccumulator().addAll(first).snapshot()}, if both were
   * obtained by calling {@code snapshot()} on the same {@link StatsAccumulator} without adding any
   * values in between the two calls, or if one is obtained from the other after round-tripping
   * through java serialization. However, floating point rounding errors mean that it may be false

   * builder.build().trimmed()}.
   */
  public static Builder builder() {
    return new Builder(10);
  }

  /**
   * A builder for {@link ImmutableLongArray} instances; obtained using {@link
   * ImmutableLongArray#builder}.
   */
  public static final class Builder {
    private long[] array;
    private int count = 0; // <= array.length

    Builder(int initialCapacity) {

 *       <b>This may change in the future.</b>
 * </ul>
 *
 * <h3>Other notes</h3>
 *
 * <ul>
 *   <li>All ranges are shallow-immutable.
 *   <li>Instances of this type are obtained using the static factory methods in this class.
 *   <li>Ranges are <i>convex</i>: whenever two values are contained, all values in between them

@GwtCompatible
@ElementTypesAreNonnullByDefault
abstract class AbstractMapBasedMultimap<K extends @Nullable Object, V extends @Nullable Object>
    extends AbstractMultimap<K, V> implements Serializable {
  /*
   * Here's an outline of the overall design.
   *
   * The map variable contains the collection of values associated with each
   * key. When a key-value pair is added to a multimap that didn't previously